Made of thermoplastic elastomer, these disposable closures produce a firm, leak-resistant seal for glass and plastic tubes

• The flexible plastic cap can be pierced as often as needed
• Will not interfere with most common chemistry, coagulation, and drug monitoring methodologies
• Can be stored in the refrigerator, in the freezer, or at room temperature
• Withstand agitation in a test tube Vortex mixer
• Available in 8 colors for easy identification

Two sizes, 13mm and 16mm, fit a variety of tubes including glass evacuated blood drawing tubes. Will also fit 12mm I.D. cuture tubes.

They will protect samples from evaporation and contamination. They can be easily applied and removed with one hand. These closures can also be punctured to allow through-cap sampling via closed-tube instrumentation systems.